#include <stdio.h>
#include <unistd.h>
#include <string.h>
int main(void)
{
    //C语言
    printf("printf\n");
    fprintf(stdout,"fprintf\n");
    
    //系统
    char buf[]="write\n";
    write(1,buf,strlen(buf));

    //加个fork
    fork();
    return 0;
}
